Lock.



K. PREUND.

LOOK.

APPLICATION FILED APLB, 1912.

Patented July 16, 1912.

Wren snares PATENT '{ormon KARL FBEUN'D, 0F ACTON, LQ NDON, ENGLAND.

LOCK.

aosaeso.

Specification o'f Letters Patent. I t nt Application filed April 8, 1912. 1 Serial no. 689,167.

To all whom it may concern: 7

Be it known that I, KARL FHEUND, a. subject of the Emperor of Germany, res1ding at 32 Goldsmith street, Acton, London, in the county of Middlesex, England, metal-- worker, have invented a new and useful Im provement in Locks, of which the following is a specification.

This invention relates to locks for fastening windows, doors and the like, and is particularly but not exclusively applicable for use with double-hung window sashes; my

primary object beingto provide. a window with a lock of such a character that the sash may be locked either. in the closed position or in any open position to which it may have been adjusted.

A look constructed according to this invention consists essentially of a ball operated by means ofapivoted member, which has a convex and a concave face, the former pivoted member frees face of said member serving to project the ball through an aperture in the front plate of the lock while the concave face of. the the ball from said aperture. The application of the invention to a window is illustrated by way of example in the accompanying drawings, in which Figure 1 is an elevation partly in-section showing a portion of the window furnished with the improved'dock; Fig. 2 is a plan view on an enlarged scale showing the lock in the locked condition, and Fig. 3- is a* view similar to Fig. 2 showing the lock in the unlocked condition.

In the construction illustrated 1 is the ball and 2 the pivoted member having a convex face 3 and a concave face 4, these two faces being oppositely disposed. T he'ball 1 and the member 2 are carried in a frame comprising a front plate-5 formed with an aperture 6, the diameter of which is less than that of the ball, and two rearwardly extending side plates 7, 7. The member 2 is provided at its ends with trunnions 8 which are supported in the plates7, 7, at the rear ends thereof, and said member is also provided with a projection 9 on the periphery thereof and disposed intermediately 0f the faces 3 and 4. The ball 1 is. interposed between the front plate 5 and the pivoted member 2, which latter serves to retain the ball in position opposite to the aperture 6 in the Plate 5. When the member 2 is turned into the position shown in Fig. 2 its convex face 3 causes the ball 1 to protrude througha July 16, 1912. a

5. For turning the member 2 a key-11 is provided the extremity of which is square or otherwise suitably formed, and engages in a correspondingly shapedrccess in one of the trunnions 8 of the said member.

For use in fastening windows of the type in which double-hung sashes are employed, each half of the window .is furnished with a lock constructed as above described, which may be mounted in one of the vertical sides' of each sash or in the window frame. In

Fig. 1 the lock is shown mounted in the lower sash '12 of the window, the upper sash 13 of which is similarly provided with a look at its upper end. The lock is housed in a recess 14 in the sash 'while the frame 15 'of the window is formed oneach side of the parting head 16 with a series of recesses'17 spaced apart to correspond with the diflf'erentdegrees of'opening desired. The distances between the recesses 17 are such that the ball 1 will be opposite a recess when the upper edge of the sash 12 is near the top edge of the recess 17 next above, as shown for instance in Fig. 1. Upon the face of the frame 15 may be mounted a rubbing plate 18 formed with apertures 19 corresponding with the recesses 17. The keyway of the lock is by preference toward the inner side of the sash which is formed with a passage 20 for the key 11 and which is provided with a key plate 21.

In Fig. 1 the lower sash isshown partially open and locked. To unlock the window the member 2 is rotated to bring the concave face 4: thereof opposite to the ball 1 which is thus released and the'sash may now be raised orlowered as desired to bring the ball 1 opposite to one of the other recesses 17 in .the. frame. The sash having been adjusted as desired, say to the. lowermost recess 17 which corresponds to the closed position, the member 2 is rotated in the reverse direction, with the effect that the convex face 3 thereof projects the ball 1 through the plate 5 and into the recess, thus locking the Window.

It will be seen that a window furnished with the improved lock the sash may be fastened either in the closed position or in any open position.

What I claim as my invention and desire to secure b Letters Patent is 2- 1. A loc comprising a face platehaving an aperture therein, a rotatable member spaced rearwardly of said plate and having convex and concave faces oppositely disposed, a ball supported by said member opposite to the aperture in said plate and means for rotating said member.

2. A look comprising a face plate having an aperture therein, two side plates extending rearwardly of. said plate, a concave-convex member rotatably mounted on said'side plates, a ball supported by said member opposite to said a erture, and a key for rotating said mem er. v

3. A look comprising a face plate having an aperture therein, a concave-convex mem-v ber spaced rearwardly of said plate, a ball supported by said member opposite to said aperture, trunnions on said, member, one of said trunnions being formed with a keyway and a key for rotating said member.

v 4. A look comprising a face plate having an aperture therein, a concave-convex member having trunnion ends, a ball, supports for said member rearwardly of said plate, means for rotatingsaid member to project said ball through said aperture, and a device.

for limiting the rotation of the said memher to half a revolution.

5. In a window the combination with a frame and a sash sliding in said frame of a concaveconvex member having trunnion ends pivotally mounted in a recess in said. sash, a face plate covering the opening of said recess and havin an aperture therein, a ball supported by "sai member opposite said aperture, 21 key adapted to engage one of the trunnions of said member for rotating the latter to projectfsaid ball into engagement with a recess formed in the window frame, and means limiting the rotation of said member to retain its concave and convex faces respectively opposite to said ball.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

' KARL FREUND.

Witnesses: 4

.H. D. JAMIESON,

G. P. LIDDON. 

